It's becoming more and more the norm:
Americans are now within mere percentage points of being a majority single nation: Only 51% of adults today are married, according to census data. And 28% of all households now consist of just one person — the highest level in U.S. history. That second statistic may appear less dramatic than the first, but it's actually changing much faster: The percentage of Americans living by themselves has doubled since 1960.
Eric Klinenberg recently lauded solo living.